Improved eye-fixation detection using polarization-modulated retinal birefringence scanning, immune to corneal birefringence

Research output: Contribution to journalArticle

Abstract

We present an improved method for remote eye-fixation detection, using a polarization-modulated approach to retinal birefringence scanning (RBS), without the need for individual calibration or separate background measurements and essentially independent of corneal birefringence. Polarization-modulated RBS detects polarization changes generated in modulated polarized light passing through a unique pattern of nerve fibers identifying and defining the retinal region where fixation occurs (the fovea). A proof-of-concept demonstration in human eyes suggests that polarization-modulated RBS has the potential to reliably detect true foveal fixation on a specified point with an accuracy of at least ± 0.75°, and that it can be applied to the general population, including individuals with sub-optimal eyes and young children, where early diagnosis of visual problems can be critical. As could be employed in an eye-controlled display or in other devices, polarization-modulated RBS also enables and paves the way for new and reliable eye-fixation-evoked humanmachine interfaces.

Original languageEnglish (US)
Pages (from-to)7972-7988
Number of pages17
JournalOptics Express
Volume22
Issue number7
DOIs
StatePublished - Jan 1 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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